Alignment markings for lens blanks



FIG. 1 is a front view of alignment markings for lens blanks of a third embodiment of our design displayed on a display, the broken line drawing of the display, lens blank, and finished lens shape is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a front view of the alignment markings for lens blanks of FIG. 1 displayed on the display in a second orientation;

FIG. 3 is a front view of the alignment markings for lens blanks of FIG. 1 displayed on the display in a third orientation;

FIG. 4 is a front view of the alignment markings for lens blanks of FIG. 1 displayed on the display in a fourth orientation; and,

FIG. 5 is a front view of the alignment markings for lens blanks of FIG. 1 displayed on the display in a fifth orientation. 

The ornamental design for alignment markings for lens blanks, as shown and described. 